Plugin and Module implementations

Summary:
Last diff in the the RNW saga.

This change creates the necessary bridgings between the module and the plugin.

With this in place, JS plugins can be written and used. Also, we have a fully functional RNW sample app.

Reviewed By: aigoncharov

Differential Revision: D39087480

fbshipit-source-id: f4fde404716aa619a64553ffa556d060f49c0ac7

react-native/react-native-flipper/windows/ReactNativeFlipper/ReactNativeFlipper.vcxproj

@@ -154,6 +154,8 @@
     <ClInclude Include="..\..\..\..\xplat\Flipper\Log.h" />
     <ClInclude Include="FlipperReactBaseSocket.h" />
     <ClInclude Include="FlipperReactDeviceInfo.h" />
+    <ClInclude Include="FlipperReactPlugin.h" />
+    <ClInclude Include="FlipperReactPluginManager.h" />
     <ClInclude Include="FlipperReactScheduler.h" />
     <ClInclude Include="FlipperReactSocket.h" />
     <ClInclude Include="FlipperReactSocketClient.h" />
@@ -175,6 +177,8 @@
     <ClCompile Include="..\..\..\..\xplat\Flipper\FlipperURLSerializer.cpp" />
     <ClCompile Include="..\..\..\..\xplat\Flipper\Log.cpp" />
     <ClCompile Include="FlipperReactDeviceInfo.cpp" />
+    <ClCompile Include="FlipperReactPlugin.cpp" />
+    <ClCompile Include="FlipperReactPluginManager.cpp" />
     <ClCompile Include="FlipperReactSocket.cpp" />
     <ClCompile Include="FlipperReactSocketClient.cpp" />
     <ClCompile Include="pch.cpp">